Spool



' 1,5433% E. ROBINSON SPOOL Filed Aug. 19, 1924 sui J7 anion: M'Mawas: q l I \K Patented June 30, 1925.

nnnnnonmson, orv cnnnnvrnnn, scum cnnonmn, Assxonoa-To; smmwisem;

-TLE comranmor woonsocxnr, nnonn ISLAND, ,a'oonr'onnrxon or RHODE ISLAND.

Application sued August"19,-19 2 i -.i seriaino. 79,953;

' To all whom it may concern: Be it known that I, EBER ROBINSON, a subject of the King of Great Britain, residing at Greenville, in the county of Greenville and State of South Carolina, have invented certain new and useful Improvements in Spools; andI do hereby declare the follow 1 skilled in theart to which it appertainsto' loosened on the barrel b reason'of the blows which the spool or bob in receives in being.

tossed into baskets or trucks, and in time the turning of the head on the spool weakens .20 the means by which the head is'held on the barrel slothat-thespool rapidly deteriorates and: finally falls to pieces. The object of the 'present'invention is to produce a corn struction of spool or bobbin by virtue-of '25 which, in addition to the ordinary means for holding the head on thelbarrel, means are provided for preventing the head from rotating with relation to the barrel, and also to produce a new construction "of spool. To these ends the present invention consists in the spool or bobbin hereinafter described and particularly defined in the claims.

In the accompanyingdrawings illustrating the preferred form of the invention, Fig. 36 1 is an elevation, a portion of which is shown in section; and Fig. 2 is a cross-section on the line 2-2, Fig. 1. v r

The spool comprises a cylindrical barrel 10. The barrel end is round and is provided witha central extension 11. The end of the barrel is provided with a conical depression 1-2 which extends from the edge of the extension 11 into it to the bore of the barrel. The barrel head 13 is provided with a recess 14: on its inner side, which is round and receives the barrel end. This recess fits the barrel end. The head is also provided with a conical hole 15 to receive the barrel end extension 11. A bushing 16 having a conical head 17 fits the conical depression in the barrel end extension and overlaps slightly beyond such extension or takes against the outer portion of the conical hole in the barrel head which constitutes in efspoon feet shoulder; Between the barrel and. the bottom of the vrecess-.114 are"steel balls 18. "Two'are sufficient in number-ror the purpose, land each ball is receivedin cavities-in both thebarrel end and headr" These cavities are formed by' vulcanizing the "head onto the barrel "with sufficient pressure to cause the;- balls to gforrn the cavi ties in the head andbarrel"whiclnreceive them."

I he. spool head on the barrel withtwo steel ba'lls between, glue beingapplied tothe surfaces, thenthe b'ushing'lti is forcedin to the endof the barrel, glue'being-appliedto it, and sufficient pressure being exerted upon-the'parts to cause the partstobefaceurately positioned with relation to each pressure if necessary until the glue is set. The barrel e'nd extension 11 ;asordinarily formed iscylindrical on its 1 peripheral surQ face, but the hole in the,head.is slightly tapered, as shown, with the result that when the bushing is forced into po'sitionil ith relation to'the barrel and head, .it;p resjses the end of the barrel extension outwardly,

holding the barrel and'ihea from relative-i rotation.

The barrel may be made of wood, and the head of vulcanized fibre or other material harder than wood, if desired,.and where i p the densities of the head and barrel-are dif ferent, the ball embeds itself "the more deeply in the element of lesser density. Thus, where the barrel is of wood and the head of vulcanized fibre, the ball will be I I more deeply embedded in thebarrelthan in the head, but-it will embed itself in both and form cavities in both soastherebyto prevent rotation of the head onthe barrel; In the drawings the balls 18are shown as two in number, located on opposite sides of the barrel. These balls are inexpensive, and being small in size-they embedthem selves readily in the head and barrel under is assembled the 'oth'erfafter which they are held in place? by or mushrooinsit slightly, so asto causethe i wood to vulcanized fibre,

Q. t T 1,548,794

the ressure ordinarily used in assemblin spoo s. They are efficient in operation, an prevent any rotation of the head with respect to the barrel. The bushing is ordinarily made of wood, although other material may be employed if desired.

One ofthe difficulties which has heretofore been experiencedin the use of vulcanized fibre for spool or bobbin heads has been that while the glue is eflicient to unite wood to wood, it does not as efficiently unite as there is little penetration of'the glue into the fibre, in consequence of which the present invention i'sparticularly useful where the-head is of hard material like vulcanized fibre, to which 1 the gluefdoes not adhere as readily as to ivood. This enables the spool or bobbin to be made with durable heads, securely fastened on the barrel, so as to be held from rotational movement with relation thereto and consequent loosening of the head on the l, nd at thesame time the head isheld' firmly and securely in place from longitudinal mo ement by the bushing.

jHaviug thus described the invention, what is-jclaimed is:

" 15A spool or bobbin having a barrel provided with a round end and an extension beyond the barrel end, a head provided with a.round recess on its inner side to receive the bar-rel end and a hole to receive the barrel;end-extension, a ball for holding the f cess of the head being barrel and head from relative rotation, the barrel end and the bottom of the round reprovided with opposed cavities extendingthe one into the barrel end and the other into but not through the head in which the ball is received, and means for engaging the barrel end extension and head to hold the head on I the barrel.

extending beyond the a barrel provided with a round end an an extension beyond the barrel end having a conical recess, a head provided with a round recess to receive the barrel end and havin a conical recess to receive the barrel en exten sion, a bushing received in the barrel having a 'head occupying the conical recess in the end of the barrel extension and a shoulder barrel end extension engaging the conical recess in the head, and a small independent locking member extendin into cavities in both the barrel and head or holding them from relative rotation.

4. A spool or bobbin having a barrel provided with a round end, an extension beyond the end having a conical recess in it,'a head name to this specification.

EBER ROBINSON. 

